Bought a lens on EBAY, but it didn't work, here's what I did.

This video shows all of the steps in great detail on how to fix a stuck aperture, and an oily aperture so that you can get the full use back out of your old manual lenses.
This particular lens was purchased from a good seller on ebay, the lens was listed as being completely functional, however when it arrived the aperture did not work at all. I was a little disappointed, but decided that I liked the lens and since it only costed $20, I'd try to fix it rather than return it.
I've tried to include every step of the process, including before and after photos! it is a long video so skip the steps you don't feel that you need to see using the timestamps below..
I hope you find the video helpful so that you can can be confident in doing the same repair.
Also, one correction, this lens was made in the 70s.
Intro - 0:01
The Problem(s) - 0:54
The Mount - 1:19
Tools - 1:30
Begin Disassembly - 3:15
How to Mark - 5:00
Stuck Blades - 8:20
Cleaning Blades - 12:30
Before Reassembly - 13:42
Reassembly Aperture - 14:17
Re-reassembly! - 16:00
Re-re-reassembly!! - 20:35
Test - 21:49
Clean Blades - 24:35
Correct Bent Arm - 27:40
Reattach Spring - 28:12
Clean Rear Lens - 29:23
Attach Aperture Ring - 29:32
Attach Mounting Plate - 31:34
Inspect & Clean - 32:50
Reattach Main Lens Body - 33:02
Reattach Shroud - 33:40
Test Function - 34:20
Clean Front Lens - 34:42
FIXED Lens Test - 35:25
Before and After Pics - 36:19
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#mirrorless
#manuallens
#vintagelens

[@TimecodePerez]

Great work! Its so helpful to see all the details. So many folks bend under snappy editing. Keep it up!

[@1davidpeter]

Brave man, nice pics. I bought that lens model as my first zoom, back in 1980, eventually sold when I got an af camera. What i liked was the lovely colour of the lens coating.

[@jjcale2288]

Very nice work! I prefer to use rubber gloves but putting the aperture plate back from downside would be quite a chalenge.

[@dudepersonvids]

Geez, I nearly had a heart attack at 11:47 when the aperture blade exploded out from the rest!

[@NeedItMakeIt]

It was a test of my patience for sure!

[@Diro_Nikhil]

Best Video on the subject

[@andyboa8107]

Same lens, same problem here. Mine is in pristine condition other than the oily blades.

[@TheNewBruno69]

i have a question, i have the exact same lest, but for a Canon A1 AE1 etc attachment aka the FD mount, for disassemble the FD mount can i just look to a different video for that? and then keep back with this one? i have the same problem about the aperture not working at all

[@doctorone1028]

Good work super video!

[@chrishudson9525]

I see why "MOST DETAILED" is in the title. You weren't kidding...

[@NeedItMakeIt]

I made the video to be a resource for people when the have the same problem as I did. Everyone will have different questions so I thought it would be best to show more rather than cutting out steps just to make the video more interesting.

[@milliehudson7565]

One requires a great deal of patience.

[@NeedItMakeIt]

It's always interesting to see what's going on inside these lenses.

[@yesthisisdonut]

hey man, fantastic video, thank you. i especially liked that you didn't cut out your fuck-up and showed your fix to it. nice job. i bought a cheap vintage zoom lens too which seems to have a similar issue - the aperture only works sometimes and it seems like there is grease built up on the blades. it's a different type of lens than the one in your video but it looks like you had some experience prior to fixing this lens. so i have a question if you don't mind: Do you think removing the rear part of my lens (tokina RMC 28-85mm f4) would suffice to access the aperture control? it's a twist-to zoom kind of lens so i'd imagine so. The lens seems like quite a gem, it would be a shame if i'd have to neglect it.

[@NeedItMakeIt]

Hey thanks, I appreciate your support. I took a look at the lens that you have and it does look similar, the lever for the aperture looks like it is quite a bit different, but I believe that you can access the aperture blades in the same manner as I did. This took me quite a while and if you want to take on this type of job you'd have to bring your patience for sure, I know mine was being tested. This was my first time taking apart any lenses, what really helped is pictures and video for reference, if something isn't fitting you can quickly go back and check to see how it should go. If yours has any springs, that's where you need to be super careful that they don't go flying! Are there any videos on KZbin for your lens?

[@yesthisisdonut]

@@NeedItMakeIt thank you. unfortunally there aren't even test videos out there, i can barely find the lens on ebay. i'll probably end up streaming the repair attempt, so i can go back and wath what i dis at any time :) thanks for the reply, much appreciated.

[@dunklunk6535]

neeeeeeded thisss

[@Doile911]

If you have some screws that are stuck, how can you get them out? what camicals can you use?

[@NeedItMakeIt]

I'd recommend giving the screwdriver a light tap on the end. Same principle as loosening a stuck bolt on the car. You probably want to avoid penetrating oils on your lens parts

[@Doile911]

@@NeedItMakeIt allright, thanks! by the by very informative video, i'll try and take apart mine today!

[@dflf]

latex gloves would’ve kept the oil from your fingers from getting on everything and then you wouldn’t spend time cleaning and re-cleaning your fingers and the lens parts

[@Vicvines]

Is there a way to get one for a Sony a7iii?

[@NeedItMakeIt]

There should be as long as they make an adapter for your Sony. www.bhphotovideo.com/c/product/1413090-REG/fotodiox_md_snye_lens_mount_adapter_for.html?pcur=CAD&gclid=EAIaIQobChMI2sTQy5-x5AIVEv_jBx171g8-EAQYASABEgIVdvD_BwE I personally prefer the manual lenses, they are so much more interactive and creative. The auto lenses are so much better for video of course. That Sony looks like a nice Camera!

[@NeedItMakeIt]

Is the Sony a full-frame? I'm not sure how well the old lenses work on that size of sensor. I bet someone on KZbin or Google has some info on it though.

[@MyKonaRC]

the "macro" part of my lens doesnt work. I cant focus any closer than 43".

[@NeedItMakeIt]

That's about right for mine also, I don't believe this one captures macro shots in the same way the new ones do. It does still collect great macro shots, but they aren't the same as what you'd find in newer lenses available now. I think mine was 15 or 20$, so still a good deal.

[@chapinteo8412]

My screwdriver kit looks like the one you have i bought it on amazon and broke almost every philips tip attemptting this,i have the same exact lens with stuck apeture at f3.8 😭,bought mine on ebay to for $11

[@chapinteo8412]

@@michaelhudson7809 i sent mine to the grave yard,i dont know why they put oil inside of the lens if it gums up the apeture blades......

[@chapinteo8412]

@@michaelhudson7809 yea i raged on the poor thing after i couldnt get the screws i needed to get out to get to the blades i was able to get all the other screws out haha,sometimes i dont get along with cheap stuff if it dont work right... 😏

[@chapinteo8412]

@@michaelhudson7809 think im better off buying a Canon sx530hs if i want telephoto reach there like $90 on ebay and have like 50x optical zoom or so... .and just use my Sony A5100 for portraits and everything else. 😅

[@sonicmistress]

If the Lens is MIJ then Phillips Screws are wrong, they should be JIS Screwdrivers and some screws have Loctite applied so just need to soak before with some Acetone.